With regards to Varane, I really don't know what to think of him, I watched him a lot as I follow Madrid (if United are not playing), to me, Ramos & Varane complemented each other very well, Ramos is an extremely proactive defender, but what made him great was that he read the game very well, while Varane excelled in covering the space behind the defensive line.
Varane with Madrid was consistent and solid in his performances, I'll admit that playing alongside an aggressive CB like Ramos and having a quality DM like Casemiro helps a lot, but nevertheless, Varane was pretty solid for Madrid, and showed the same solidity with France NT.
Then there's the Varane I saw last season, who started promisingly, but was then injured a lot and was never able be fit enough to build a consistent form, and even when played, was never convincing in his performances, and now, he isn't even having a good pre-season, and I don't think it's even injuries, it feels as if he has dropped a level or two in terms of quality, which is really disappointing to see, the hope here is that maybe a challenge for a starting spot will make him push himself to get back to his best level.